文章基本信息

标题：CHEIAS DO RIO BRANCO E EVENTOS DE INUNDAÇÃO NA CIDADE DE BOA VISTA, RORAIMA (Branco river floods and flood events in the Boa Vista city, Roraima, Brazil)
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作者：Carlos SANDER ; Fábio Luiz WANKLER ; Renato Augusto de Oliveira EVANGELISTA 等
期刊名称：Revista ACTA Geográfica
印刷版ISSN：1980-5772
电子版ISSN：2177-4307
出版年度：2012
卷号：6
期号：12
页码：41-57
DOI：10.5654/actageo2012.0612.0003
出版社：Editora da Universidade Federal de Roraima (EdUFRR)
摘要：This article aims to discuss the flooding caused by the Branco river that affect the urban area of the city of Boa Vista. The Boa Vista city is installed on the right bank of the Branco river and is responsible for draining an area of 100,000 km2. The methodology involved a survey of the maximum annual flood of the Branco river in Boa Vista, the application of the Gumbel method to define there currence of flood event sand determining the area inundated by the worst flooding of the Branco river from the association's quota flood with the plantplanialtimetric of Boa Vista city.The results showed that the largest event of flooding of the Branco river occurred in June 2011, reaching the altimetry of 66.42m, covering an area of 6.16km2 (616 ha), but with a recurrence period estimated at 42 years. The second major event of the series occurred in 1976, reaching the altimetry of 65.95m, when affected an area of 5.85km2 and an expected turn around time of 21 years. The study points to the lack of data for defining full secular and the possible influences of engineering works at the level of major floods.
关键词：flood events; recurrence; Branco river; Boa Vista; RR.